Magtech First Defense 300 AAC Blackout 123 Grain FMJ Ammunition

The Magtech First Defense 300 AAC Blackout 123 grain FMJ ammunition delivers reliable, cost-effective performance for shooters running .300 BLK rifles, short-barreled rifles (SBRs), and intermediate-distance tactical or hunting applications. Loaded to supersonic velocities, this round pairs full metal jacket construction with consistent factory quality control—giving you the dependability of a premium load without the premium price tag. Whether you're zeroing a new build, running drills at the range, or hunting with subsonic-capable platforms, First Defense offers the shot-to-shot consistency serious shooters expect.

Magtech manufactures this ammunition in-house using rigidly controlled components and sealed primers and bullets to guard against moisture during storage. The brass cases are Boxer-primed and fully reloadable, so handloaders can stretch the value even further. You get clean, consistent ignition and extraction cycle after cycle—the foundation of any good practice or duty round.

At 123 grains and 2,230 fps, this load sits in the sweet spot for 300 BLK shooters who want supersonic velocity without breaking the bank. The FMJ bullet design ensures reliable feeding and penetration in rifles and SBRs alike, making it a sensible choice for range time, tactical training, or field use where you need ammunition you can trust.

Key Features

• 123-grain full metal jacket bullet optimized for .300 AAC Blackout rifles
• Supersonic velocity (2,230 fps) suitable for tactical, competition, and hunting use
• Sealed primers and bullets for long-term moisture protection
• Boxer-primed brass cases—fully reloadable
• In-house manufacturing with high-grade quality control
• Consistent shot-to-shot performance

Specifications

Frequently Asked Questions

Will this ammunition work in short-barreled rifles and SBRs?

Yes. Magtech First Defense 123-grain FMJ is loaded for .300 BLK rifles, including SBRs. The 2,230 fps supersonic velocity is compatible with any standard 300 Blackout chamber.

Is this ammunition reloadable?

Yes. The brass cases are Boxer-primed, making them suitable for reloading after use.

Can I use this for hunting?

Yes. First Defense is loaded for tactical, competition, and hunting applications. The 123-grain FMJ bullet design provides reliable feeding and penetration in field conditions.

How is this ammunition stored to maintain long-term reliability?

Magtech seals both the primers and bullets to keep moisture out during storage, helping ensure consistent performance even after extended shelf time.